COSMOTE Global Solutions NV, a distinguished member of the OTE Group of Companies, is an ICT Systems Integrator offering a comprehensive range of ICT Solutions and Services. We are actively seeking a seasoned Back-end Developer to strengthen our innovative technology team.
In this role, you will be responsible for developing and maintaining robust server-side applications, ensuring seamless integration with front-end components, and optimizing system performance. You will collaborate with cross-functional teams to deliver scalable, secure, and efficient back-end solutions that meet business requirements.
Key Responsibilities:
- Develop and maintain scalable back-end services and APIs.
- Implement core business logic and ensure data integrity and security.
- Integrate server-side logic with front-end components.
- Design and optimize databases for performance and reliability.
- Adopt secure coding practices to protect application and data security.
- Follow best practices for code quality, versioning, and documentation.
- Conduct code reviews, debugging, and testing to identify and resolve issues.
- Collaborate with product managers, front-end developers, and other stakeholders during the development lifecycle.
- Participate in architectural decisions and technology evaluations to improve system design.
- Maintain up-to-date technical documentation.
Requirements
- Bachelor’s Degree in Computer Science, Engineering, or a related field.
- Minimum of 13 years of professional experience in back-end development.
- Strong proficiency in Java (version 17 or above), Kotlin, vert.x, Spring Boot (WebFlux), and Hibernate.
- Experience with microservices architecture and API-driven development.
- Knowledge of integration protocols such as AS4.
- Proficient in database design and management using MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch.
- Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes.
- Solid understanding of security frameworks including OpenID Connect, OAuth2, TLS, and Keycloak.
- Experience with security testing and dependency management tools such as SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, and Maven.
- Proficient with collaboration and productivity tools including JIRA, Confluence, Office 365, and SharePoint.
- Excellent problem-solving skills, with the ability to work effectively in a multicultural and international environment.
- Fluent in English (C2 level) both spoken and written.
- Strong communication skills, adaptability, and capacity to work under changing requirements.
Skills Required
- Bachelor's Degree in Computer Science, Engineering, or a related field
- Minimum of 10 years of professional experience in back-end development
- Strong proficiency in Java (version 17 or above), Kotlin, vert.x, Spring Boot (WebFlux), and Hibernate
- Experience with microservices architecture and API-driven development
- Knowledge of integration protocols such as AS4
- Proficient in database design and management using MongoDB, PostgreSQL, Virtuoso Triple Store, and OpenSearch
- Hands-on experience with containerization and orchestration tools such as Docker and Kubernetes
- Solid understanding of security frameworks including OpenID Connect, OAuth2, TLS, and Keycloak
- Experience with security testing and dependency management tools such as SAST, DAST, Fortify, SonarQube, Sonatype, Dependency-Track, and Maven
- Proficient with collaboration and productivity tools including JIRA, Confluence, Office 365, and SharePoint
- Fluent in English (C2 level) both spoken and written
What We Do
COSMOTE Global Solutions, as a member of OTE Group of Companies, is an ICT Systems Integrator delivering a broad range of ICT Solutions and Services. CGS provides a broad range of ICT Services focusing on: Cloud, Data Centre operations, Networking, Cybersecurity, BI and Data Warehouse, Big Data, Service Desk, Proactive Monitoring, Operations and Support, Service Management, Project and Programme Management, and Professional Services. OTE Group: OTE Group is the largest technology provider in Greece. It is one of the top three listed companies with respect to capitalization, in the Athens Stock Exchange. Deutsche Telekom holds 46.9% of OTE’s share capital and the Greek State holds 5.6%. Find More about OTE Group Our Vision: We digitize societies so that everyone can live and enjoy at the fullest all possibilities offered now while also building on them for a better tomorrow. Our Mission: • We bring the best communication services to our customers • We connect people • We entertain • We help businesses grow. • We are leaders, pioneers, pillar of the economy and society • With passion, faith and commitment • We constantly strive to become better on all fronts • We have a positive impact on society and the environment
